CN105793162B

CN105793162B - Peel container and its manufacturing method is laminated

Info

Publication number: CN105793162B
Application number: CN201480064827.7A
Authority: CN
Inventors: 樽野真辅
Original assignee: Kyoraku Co Ltd
Current assignee: Kyoraku Co Ltd
Priority date: 2013-11-27
Filing date: 2014-11-20
Publication date: 2019-07-02
Anticipated expiration: 2034-11-20
Also published as: US20170036802A1; US11542055B2; EP3366598B1; AU2019203480A1; US20210147105A1; CN109808979A; US10947001B2; AU2019203480B2; CN105793162A; AU2014355546A1; CN109808980B; KR102279763B1; AU2017265057B2; EP3366598A1; WO2015080017A1; EP3075671A4; KR102136665B1; AU2014355546B2; AU2017265057A1; CN110040326A

Abstract

A kind of stacking peel container (1) that productivity is outstanding is provided.1st viewpoint according to the present invention, it provides a kind of with shell (12) and inner bag (14) and the reduction with content, the inner bag (14) is removed from the shell (12), the stacking peel container (1) of the container body (3) of contraction, the container body (3) of the stacking peel container (1) has bottom surface bottom sealing protruding portion (27) outstanding from the receiving portion (7) for accommodating content, bottom sealing protruding portion (27) is the sealing of the stacking parison in the blow molding using cylindric stacking parison and bending is constituted, the cylindric stacking parison has the outer layer (11) for constituting shell (12) and constitutes the internal layer (13) of inner bag (14).

Description

Peel container and its manufacturing method is laminated

[technical field]

The present invention relates to a kind of stacking peel container and its manufacturing methods, as the reduction internal layer of content is shelled from outer layer From contraction.

[background technique]

It is known in the art that stacking peel container, be the reduction along with content, internal layer removes from outer layer, It shrinks, from the problem of inhibiting air to enter (such as Patent Documents 1 to 2) inside container.Such stacking peel container have by The inner bag that internal layer is constituted and the shell being made of outer layer.

Such a laminated glass container is manufactured generally by the blow molding of cylindric stacking parison has been used. Also, the sealing when the bottom of container body is equipped with welding laminated type base one end, but because of the shock resistance of sealing thus It is weaker, in order to improve intensity, it is set as prominent from the bottom surface of container.In patent document 1, in order to further increase this sealing Intensity, welding keeps the welding layer of sealing mutually ratcheting by most embedded divisions.

[background technology document]

[patent document]

[patent document 1] Japanese Patent No. 3401519

[patent document 2] Japanese Patent No. 3650175

[summary of the invention]

[subject to be solved by the invention]

(the 1st viewpoint)

In order to realize the composition of patent document 1, need the needle of extruded parison welding layer to be arranged in mold and mould structure becomes Obtain complicated, increase production cost.Therefore, it is necessary to use the simpler structure-reinforced sealing of structure.

1st viewpoint of the invention is completed in view of for such situation, is provided the outstanding stacking removing of productivity and is held Device.

(the 2nd viewpoint)

Stacking peel container is normally mounted at oral area installation nut cap and uses, but in order to prevent between nut cap and oral area Gap leakage content, use the nut cap that inner ring is adhered with inside oral area.

But the discovery in the test of laminated glass container installation nut cap is repeated in the present inventor, because inner ring is stuck in mouth Portion's internal layer and cause internal layer to be bent, or even when bad luck, it may appear that the internal layer at oral area is completely exfoliated from outer layer, makes inner bag The case where falling off in the shell.

Completing in view of for such situation for 2nd viewpoint of the invention, provides and is able to suppress laminated glass container Internal layer removing at oral area.

[in order to solve the technological means of project]

(the 1st viewpoint)

1st viewpoint according to the present invention, provides a kind of stacking peel container, and the stacking peel container has container master Body, the container body have shell and inner bag, and with the reduction of content, the inner bag is removed from the shell, shunk, institute Container body is stated with the bottom surface sealing protruding portion in bottom outstanding from the receiving portion for accommodating content, the bottom sealing protruding portion is It has used the sealing of the stacking parison in the blow molding of cylindric stacking parison and has been bent, the cylindric stacking The internal layer that parison has the outer layer for constituting set shell and constitutes the inner bag.

The present inventor has found after conscientiously research, by sealing the bottom surface of container body receiving portion bottom outstanding The curved simple structure of protruding portion, can strengthen sealing, to complete the present invention.

Hereinafter, showing various embodiments of the 1st viewpoint of the invention.The embodiment of following presentation can be mutual group It closes.

Have thinner wall section described in thinner wall section, wall ratio thick in sequence from the ground side it is preferred that the bottom seals protruding portion Thick wall portion.It is preferred that the bottom sealing protruding portion is bent in the thinner wall section.

It is preferred that the neighboring area that the bottom surface has concave region and is arranged in around the concave region, the bottom sealing is protruded Portion is arranged in the concave region.

It is preferred that the bottom sealing protruding portion is configured to not dash forward from the face as defined in the neighboring area in the state of bending Out.

It is preferred that the concave region is set as crossing the entire bottom surface in the longitudinal direction that the bottom seals protruding portion.

The present invention provides the manufacturing method of above-mentioned stacking peel container, which is characterized in that tool according to other viewpoint Have through the blowing hot-air after the blow molding, by the softening of bottom sealing protruding portion, curved process.

(the 2nd viewpoint)

2nd viewpoint according to the present invention provides a kind of stacking peel container, with container body, container body tool The oral area for having the receiving portion for accommodating content and the content being discharged from the receiving portion, and the receiving portion and the mouth Portion has outer layer and internal layer, and with the reduction of content, the internal layer is removed from the outer layer, shunk, and the stacking removing is held Device is characterized in that the oral area has the wide diameter portion that the oral area front end is arranged in, and setting is more leaned on than the wide diameter portion The position of the nearly receiving portion and the internal layer support portion to fall off for inhibiting the internal layer.

The present inventor has found that the oral area of present stacking peel container is about cylindrical shape after conscientiously research, because The reason of deviation when to produce etc., it is interior at the front end of oral area in the case where the internal diameter of oral area is also smaller than the outer diameter of inner ring The front end of ring can sometimes enter between internal layer and outer layer.

In view of such discovery, it is contemplated that wide diameter portion is arranged in the front end of oral area, and the such stacking of actual production is shelled It is found from after container, inner ring can be inhibited to enter between internal layer and outer layer, and the internal layer at peel container oral area can be inhibited Removing.

According to such method, the phenomenon that capable of preventing inner bag from falling to shell, but will appear due to internal layer and inner ring Friction, in order to be better protected from such phenomenon, further grind at internal layer removing and inner bag the phenomenon that falling to shell After studying carefully, it is contemplated that the internal layer support portion for preventing internal layer from falling off is being set closer to the position of main body side than wide diameter portion, is being completed The present invention.

Hereinafter, showing the 2nd various embodiments of viewpoint of the invention.The embodiment of following presentation can be combined with each other.

It is preferred that the receiving portion has the trunk towards the field edge direction cross sectional shape constant of the receiving portion, and The shoulder between the trunk and the oral area is connected, the side between the shoulder or the shoulder and the trunk Boundary has bending section, and the bending angle of the bending section is the curvature of 140 degree or less and the container inner face side in the bending section Radius is 4mm.

It is preferred that the bending angle is 120 degree or less.

It is preferred that the radius of curvature is 2mm or less.

It is preferred that the distance of container inner face that mandrel from container is arranged in the bending section in the bending section is from described Container central axis to the oral area container inner face distance 1.3 times or more of position.

It is preferred that the wall thickness of the oral area is 0.45~0.50mm, the wall thickness of the bending section is 0.25~0.30mm, described The wall thickness of trunk is 0.15~0.20mm.

Also, in aftermentioned embodiment, test example 1 is related to valve member, and test example 2 is related to the installation position of valve member Shape, test example 3 is related to using the effect of random copolymer in outer layer, and test example 4 is related to using evoh layer as internal layer most Effect when internal layer.

[Detailed description of the invention]

[Fig. 1] is the perspective view for indicating stacking 1 structure of peel container of the 1st embodiment of the invention, and (a) is whole Figure, (b) bottom (c) indicate the enlarged drawing near valve member mounting recess 7a.(c) state of valve member 5 is unloaded in expression.

[Fig. 2] indicates the stacking peel container 1 of Fig. 1, and (a) is main view, is (b) rearview, is (c) top view, (d) faces upward View.

[Fig. 3] is the Section A-A figure in Fig. 2 (d).But FIG. 1 to FIG. 2, indicate the shape before bottom sealing protruding portion 27 is bent State, Fig. 3 indicate the state after bottom sealing protruding portion 27 is bent.

[Fig. 4] is the enlarged drawing containing 9 region of oral area in Fig. 3.

[Fig. 5] is the state for indicating internal layer 13 and removing from Fig. 4 state.

[Fig. 6] is the enlarged drawing comprising 29 region of bottom surface in Fig. 3, and (a) indicates the state before the bottom sealing bending of protruding portion 27, (b), the state after bottom sealing protruding portion 27 is bent is indicated.

[Fig. 7] is the cross-sectional view for indicating outer layer 11 and 13 layers of internal layer composition.

[Fig. 8] is the perspective view for indicating the various structures of valve member 5.

[Fig. 9] illustrates that 1 manufacturing process of peel container is laminated in Fig. 1.

[Figure 10] indicates that internal layer prepares another embodiment of the moulding process of strip external gas introducing port.

[Figure 11] indicates that internal layer prepares another embodiment of the moulding process of strip external gas introducing port.

[Figure 12] is the sectional view for indicating the front end geometry of tubular blade, the front end (a) be it is pointed, front end (b) is round.

[Figure 13] indicates the subsequent manufacturing processes being laminated after Figure 11 of peel container 1 in Fig. 1.

[Figure 14] indicates the application method that peel container 1 is laminated in Fig. 1.

[Figure 15] indicates 1 structure of stacking peel container of the 2nd embodiment of the invention, and (a) is perspective view, is (b) valve Expanded view near component mounting recess 7a (c) is A-A sectional view in (b).(b)~(c) it indicates after unloading valve member 5 State.

[Figure 16] indicates the configuration example 1 of valve member 5, and (a) is perspective view, is (b) main view.

[Figure 17] indicates the configuration example 2 of valve member 5, and (a) is perspective view, is (b) main view.

[Figure 18] indicates the configuration example 3 of valve member 5, and (a) is perspective view, is (b) main view.

[Figure 19] indicates the configuration example 4 of valve member 5, and (a) is perspective view, is (b) main view.

[Figure 20] indicates the configuration example 1 of valve member 5, and (a) is perspective view, is (b) main view, be (c) in terms of bottom surface side Perspective view.

[Figure 21] indicates the valve member 5 of the stacking peel container 1 of the 3rd embodiment of the invention, and (a)~(b) is valve portion The perspective view of part 5, (c) be valve member 5 main view, (d)~(e) is the state that valve member 5 is equipped with outer gas entrance hole 15 Main view (shell 12 is sectional view).

[specific embodiment]

Hereinafter, being illustrated about embodiments of the present invention.Various features shown in following implementation, can be mutual It is combined.Also, each feature independently sets up invention.

1. the 1st embodiment

As shown in FIG. 1 to FIG. 2, the stacking peel container 1 of the 1st embodiment of the invention has container body 3 and valve portion Part 5.Container body 3 has the receiving portion 7 for accommodating content and the oral area 9 of content is discharged from receiving portion 7.

As shown in figure 3, container body 3 has outer layer 11 and internal layer 13 in receiving portion 7 and oral area 9, shell 12 is by outer layer 11 are constituted, and inner bag 14 is made of internal layer 13.As the reduction internal layer 13 of content is removed from outer layer 11, inner bag 14 is shelled from shell 12 From, shrink.

As shown in figure 4, oral area 9 is provided with external thread part 9d.Tool internal thread nut cap and pump are installed in external thread part 9d Deng.In Fig. 4, a part of the nut cap 23 with inner ring 25 is shown.The outer diameter of inner ring 25, it is generally with 9 internal diameter of oral area, interior The outer surface of ring 25 connects can prevent content from leaking outside in the bearing surface 9a of oral area 9.In the present embodiment, the front end of oral area 9 It is provided with wide diameter portion 9b, because bigger than the internal diameter of abutting part 9e, the outer surface of inner ring 25 does not contact the internal diameter of wide diameter portion 9b To wide diameter portion 9b.When oral area 9 does not have wide diameter portion 9b, generated when manufacturing the internal diameter of oral area 9 when having small manufacture deviation Inner ring 25 enters such manufacture unfavorable condition between outer layer 11 and internal layer 13, but when oral area 9 has wide diameter portion 9b, oral area 9 Internal diameter do not generate such unfavorable condition having slight variation yet.

Also, oral area 9 has the internal layer branch for inhibiting internal layer 13 to fall off at the position for also proximating receiving portion 7 than abutting part 9e The support part portion 9c.Internal layer support portion 9c is that necking down is arranged in oral area 9 to be formed.Even if wide diameter portion 9b is arranged in oral area 9, due to inner ring 25 also there is the case where internal layer 13 is removed from outer layer 11 with the friction of internal layer 13.In present embodiment, even if in such situation Under, because having internal layer support portion 9c that internal layer 13 is inhibited to fall off, so as to inhibit inner bag 14 to fall off inside shell 12.

As shown in Fig. 3~Fig. 5, receiving portion 7 has the cross-sectional shape towards the longitudinal direction of the receiving portion substantially permanent The shoulder 17 of fixed trunk 19 and connection trunk 19 and oral area 9.Shoulder 17 is provided with bending part 22.Bending part 22 be as Fig. 3 indicates bending angle α at 140 degree or less and the radius of curvature of container inner face side is in the part below 4mm.There is no bending part When 22, the removing between internal layer 13 and outer layer 11 expands to oral area 9 from trunk 19, and internal layer 13 is also from outer layer present in oral area 9 The case where 11 removing.In oral area 9, internal layer 13 from outer layer 11 remove if inner bag 14 fall off in 12 the inside of shell, therefore in oral area 9 It is undesirable that internal layer 13 is removed from outer layer 11.In the present embodiment, because being provided with bending part 22, internal layer 13 and outer layer 11 Between removing expand to bending part 22 from trunk 19 if, internal layer 13 as shown in Figure 5 is bent in bending part 22, internal layer 13 do not pass to the upper portion of bending part 22 from the power that outer layer 11 is removed, as a result, in the part than 22 upper side of bending part Layer 13 is suppressed from the removing of outer layer 11.In addition, though bending part 22 is arranged in shoulder 17, bending part 22 in Fig. 3~Fig. 5 The intersection in shoulder 17 and trunk 19 can be set.

For the lower limit of bending angle α, although without special provision, but from the aspect of ease of manufacturing, It is preferred that at 90 degree or more.The lower limit of radius of curvature is also without special provision, but from the aspect of ease of manufacturing, preferably In 0.2mm or more.Also, in order to which the relatively reliable internal layer 13 for preventing oral area 9 is removed from outer layer 11, bending angle α preferably 120 Degree is hereinafter, the preferred 2mm or less of radius of curvature.Bending angle α specifically can be such as 90,95,100,105,110,115, 120,125,130,135,140 degree, the numerical value being also possible between any two number shown here.Radius of curvature it is specific and Speech can be such as 0.2,0.4,0.6,0.8,1,1.2,1.4,1.6,1.8,2mm, be also possible to any 2 numbers shown here Between value.

As shown in figure 4, for bending part 22, the distance L2 of inner surface of container of the mandrel C at bending part 22 from container It is 1.3 times or more of the distance L1 of inner surface of container of the mandrel C at oral area 9 from container.Removing is laminated in present embodiment Container 1 is blow molding because the bigger wall thickness of blow-up ratio at the bigger bending part 22 of L2/L1 is also thinner, make L2/L1 >= If 1.3, the wall thickness of internal layer 13 just becomes very thin at bending part 22, and internal layer 13 becomes easy bending at bending part 22, It is possible to more reliably prevent internal layers 13 at oral area 9 removes from outer layer 11.L2/L1 preferably such as 1.3~3,1.4~2.L2/L1 is specific For can be such as 1.3,1.4,1.5,1.6,1.7,1.8,1.9,2,2.5,3, be also possible to shown here any two Numerical value between number.

In one example, the wall thickness at oral area 9 is 0.45~0.50mm, the wall thickness at bending part 22 is 0.25~ 0.30mm, the wall thickness at trunk 19 are 0.15~0.20mm.In this way, the wall thickness of bending part 22 is compared with the wall thickness of oral area 9 Very small, thus bending part 22 effectively plays its function.

As shown in figure 4, valve member 5 is provided in receiving portion 7, to adjust the intermediate space 21 between shell 12 and inner bag 14 Air disengaging between the exterior space S of container body 3.Connection intermediate space 21 is provided at the receiving portion of shell 12 7 With the extraneous gas entrance hole 15 of exterior space S.Extraneous gas entrance hole 15 is the through-hole being positioned only at shell 12, is not contacted To inner bag 14.The intermediate space 21 1 that valve member 5 includes and is inserted into 15 axle portion 5a of extraneous gas entrance hole, axle portion 5a is arranged in It side and the cover 5c bigger than the sectional area of axle portion 5a and is arranged on the side exterior space S of axle portion 5a and prevents valve Component 5 enters the holding section 5b of intermediate space 21.In present embodiment, axle portion 5a can be sliding with opposite outer gas introducing port 15 It is dynamic.

The structure of cover 5c is when shell 12 compresses to block substantially extraneous gas entrance hole 15, with close to axle portion The shape that 5a becomes smaller at cross section.Also, the structure of holding section 5b restores Shi Nengxiang intermediate space after shell 12 is compressed 21 import air.If compression shell 12, the pressure of 21 the inside of intermediate space becomes higher than the pressure of outside, in intermediate space 21 The air in face is discharged to outside from extraneous gas entrance hole 15.Cover 5c is imported to extraneous gas due to pressure difference and air-flow Hole 15 is mobile, cover 5c block outside gas introducing port 15.For cover 5c, with what is become smaller close to axle portion 5a at cross section Shape, therefore cover 5c is easy to be embedded into extraneous gas entrance hole 15 to block outside gas introducing port 15.

In this condition if further compression shell 12, as a result the pressure rise of 21 the inside of intermediate space makes inner bag 14 compressions, the content of 14 the inside of discharge inner bag.Also, if releasing the compressing force to shell 12, shell 12 due to itself Elasticity and have the tendency that recovery.At this moment, cover 5c leaves extraneous gas entrance hole 15, and the obstruction of extraneous gas entrance hole 15 is solved It removes, the gas of outside enters in intermediate space 21.Also, in order to make holding section 5b not block outside gas introducing port 15, The position that holding section 5b is contacted with shell 12 is provided with protrusion 5d, since protrusion 5d and shell 12 are contacted, in shell 12 and engaging Gap is provided between portion 5b.In addition, the substitution as setting protrusion 5d, can also be prevented by the way that groove is arranged in holding section 5b Only holding section 5b block outside gas introducing port 15.The specific composition of valve member 5 is shown in Fig. 8 and Figure 16~Figure 20.

For valve member 5, extraneous gas entrance hole 15 is pushed in cover 5c support open, and cover 5c is inserted into intermediate space In 21, it is possible thereby to be mounted on container body 3.For this purpose, the shape that the front end of cover 5c is preferably tapering.Such valve member 5 The outside of cover 5c container body 3 need to be pressed into can complete to install into intermediate space 21, so productivity is excellent.

Receiving portion 7 is covered after installing valve member 5 with shrink film.At this moment, valve member 5 is mounted on and is set to receiving The mounting recess 7a in portion 7, makes valve member 5 not interfere with shrink film.Also, setting is from valve member mounting recess 7a to 9 side of oral area Make valve member mounting recess 7a not be retracted film to the air flow channel 7b of extension to block.

The shoulder 17 of shell 12 is arranged in valve member mounting recess 7a.Shoulder 17 is inclined-plane, in valve member mounting recess 7a It is interior to be equipped with flat site FR.Because flat site FR is arranged to the inclined-plane general parallel orientation with shoulder 17, flat site FR For inclined-plane.Because extraneous gas entrance hole 15 is arranged on the flat site FR in valve member mounting recess 7a, external gas Body entrance hole 15 is arranged on inclined-plane.Extraneous gas entrance hole 15 is arranged on such as vertical plane of trunk 19, once The inner bag 14 of removing, which touches valve member 5, may hinder valve member 5 mobile, in the present embodiment, extraneous gas entrance hole 15 are arranged on inclined-plane, and there will be no such influences, ensure that the smooth movement of valve member 5.In addition, the tilt angle on inclined-plane It is not particularly limited, preferably 45~89 degree, more preferable 55~85 degree, further preferred 60~80 degree.

Also, as shown in Fig. 1 (c), the flat site FR in valve member mounting recess 7a is arranged to extraneous gas entrance hole 15 extend the width W of 3mm or more (preferably 3.5mm or 4mm or more) to surrounding.For example, if extraneous gas entrance hole 15 is φ 4mm, if the center of flat site FR is arranged in extraneous gas entrance hole 15, valve member mounting recess 7a is φ 10mm or more. The upper limit of the width W of flat site FR does not have special provision, but as the width W of flat site FR increases, valve member installation is recessed The area of portion 7a becomes larger, and as a result the interval area between shell 12 and shrink film also becomes larger, therefore width W preferably should not mistake Greatly, the upper limit is such as 10mm.Therefore, amplitude W can be 3~10mm, and specifically such as 3,3.5,4,4.5,5,6,7,8,9, 10mm, the numerical value being also possible between any two number shown here.

Also, the present inventor is by experiment (experimental example 2) discovery, if the flat site FR of 12 outer surface side of shell is got over The radius of curvature of width, 12 inner surface of shell is bigger, and flat site FR is arranged to gas introducing port in the outer surface side of shell 15 to surrounding extend 3mm or more range when, the radius of curvature of 12 inner surface of shell becomes very large, and as a result improves shell 12 Adaptation between valve member 5.The radius of curvature of 12 inner surface of shell is in the range of external 15 surrounding 2mm of gas introducing port It is preferred that 200mm or more, more preferable 250mm or more or 300mm or more.When radius of curvature is these values, the inner surface of shell 12 It is essentially flat, because the adaptation between shell 12 and valve member 5 is good.

As shown in Fig. 1 (b), at the bottom surface 29 of receiving portion 7, it is provided with central recessed area 29a and is arranged around it Neighboring area 29b, at central recessed area 29a, be provided with from the bottom of 29 protrusion of bottom surface and seal protruding portion 27.As Fig. 6 (a)~ (b) shown in, bottom sealing protruding portion 27 is the layer using the blow molding with outer layer 11 and the cylindric stacking parison of internal layer 13 Stack-type base sealing.Bottom seal protruding portion 27 from 29 side of bottom surface have in order base portion 27d, thinner wall section 27a and, compare thinner wall section The big thick wall portion 27b of 27a wall thickness.

After blow molding, as shown in Fig. 6 (a), bottom sealing protruding portion 27 is flat relative to being determined by neighboring area 29b The state of face P and generallyperpendicular standing, but under this state, when increasing container and being impacted, the internal layer 13 of weld part 27c It is easily separated from, impact resistance is insufficient.And in present embodiment as shown in Fig. 6 (b), protruding portion is sealed the bottom of to after blow molding 27 blowing hot-airs soften thinner wall section 27a, and bottom is bent at thinner wall section 27a and seals protruding portion 27.In this way, close only by bending bottom Simple procedures as envelope protruding portion 27 can improve the impact resistance of bottom sealing protruding portion 27.Moreover, as shown in Fig. 6 (b), it is curved The not prominent plane P determined by neighboring area 29b of bottom sealing protruding portion 27 after folding.In this way, stacking peel container 1 is erected to come When, can prevent bottom sealing protruding portion 27 it is outstanding from plane P and caused by stacking peel container 1 rock.

In addition, base portion 27d is than thinner wall section 27a closer to 29 side of bottom surface and the part also thicker than thinner wall section 27a, Even if can also be with without base portion 27d, bottom can be improved by the way that thinner wall section 27a is arranged on base portion 27d and seal protruding portion 27 Impact resistance.

Also, as shown in Fig. 1 (b), the recessed area of bottom surface 29 is traversed whole in the longitudinal direction of bottom sealing protruding portion 27 A bottom surface 29.That is, center recessed area 29a is connected with periphery recessed area 29c.In such a configuration, bottom is close Envelope protruding portion 27 is easy to be bent.

Next the layer structure of container body 3 is described in detail.Container body 3 has outer layer 11 and internal layer 13.

Outer layer 11, by such as low density polyethylene (LDPE), straight-chain low density polyethylene, high density polyethylene (HDPE), polypropylene, ethylene- Propylene copolymer and its mixture are constituted.Outer layer 11 can be multilayered structure.For example, structure, which can be polypropylene layer, is clipped in regeneration The two sides of layer.Here so-called regeneration zone is the layer flash (burr) recycling generated at the time of molding in container.Moreover, The structure of outer layer 11 is than internal layer 13 thicker to improve restoration.

In this real mode, outer layer 11 has the random copolymer of the random copolymer composition between propylene and other monomer Layer.Outer layer 11 can be the single layer of random copolymerization nitride layer, be also possible to multilayered structure.For example, it may be with random copolymerization nitride layer Clamp the composition of regeneration zone two sides.Since outer layer 11 is made of specific random copolymer, 12 recovery of shape of shell can be improved Property transparency heat resistance.

The content of monomer in random copolymer other than propylene is less than 50mol%, preferably 5~35mol%.This contains measurer It can be such as 5,10,15,20,25,30mol% for body, the number being also possible between any two number shown here Value.As the monomer with propylene copolymerisation, the impact resistance of random copolymer is improved compared with polyacrylic homogeneous polymers If, particularly preferred ethylene.About the random copolymer of propylene and ethylene, the content of ethylene preferably 5~30mol%, tool It can be such as 5,10,15,20,25,30mol% for body, the number being also possible between any two number shown here Value.The weight average molecular weight of random copolymer is preferably 10~500,000, more preferably 10~300,000.This weight averaged molecular Amount specifically can be such as 10,15,20,25,30,35,40,45,50 ten thousand, be also possible to any two shown here Numerical value between number.

Also, the tensile modulus of elasticity of random copolymer preferably 400~1600MPa, 1000~1600MPa.Tensile elasticity For modulus in this range, recovery of shape is especially good.Tensile modulus of elasticity specifically can be such as 400,500,600, 700,800,900,1000,1100,1200,1300,1400,1500,1600Mpa, it is also possible to shown here any two Numerical value between number.In addition, the use feeling of container is bad if container is really up to the mark, therefore can also be random copolymer and example Such as straight-chain low density polyethylene flexible material mixing constitutes outer layer 11.But for the mixing material of random copolymer, in order to Hinder the validity of random copolymer significantly, the weight of mixing material is preferably shorter than the 50% of mixture total weight.Example The mixing material that random copolymer and straight-chain low density polyethylene that weight ratio is 85:15 such as can be used constitutes outer layer 11.

As shown in Fig. 7 (a), internal layer 13 has the evoh layer 13a for being set to container outer surface side, is set to evoh layer 13a Container inner face side interior surface layers 13b and the adhesive layer 13c that is set between evoh layer 13a and interior surface layers 13b.Setting Evoh layer 13a can improve gas barrier property and the fissility from outer layer 11.

Evoh layer 13a is ethylene-vinyl alcohol copolymer (EVOH) resin layer, adds water by the copolymer of ethylene and vinyl acetate Decomposition obtains.The ethylene contents of EVOH resin can be 25~50mol%, it is contemplated that oxygen-barrier property, preferably 32mol% with Under.The lower limit of ethylene contents does not have a special provision, but the easier decline of flexibility of the fewer evoh layer 13a of ethylene contents, excellent Select 25mol% or more.Also, evoh layer 13a preferably comprises deoxidier.If evoh layer 13a contains deoxidier, EVOH can be improved The oxygen-barrier property of layer 13a.The preferred 2350MPa of the bending elastic modulus of EVOH resin is hereinafter, more preferably 2250MPa or less. The bending elastic modulus lower limit of EVOH resin does not have special provision, can be for example, 1800,1900 or 2000MPa.The elasticity of flexure Modulus can be measured according to the test method of ISO178.Test speed is 2mm/min.

The fusing point of EVOH resin is preferably higher than constituting the fusing point of the random copolymer of outer layer 11.It preferably uses and adds on outer layer 11 Hot type punching machine processes extraneous gas entrance hole 15, by keeping the fusing point of EVOH resin higher than the fusing point of random copolymer, energy It prevents when extraneous gas entrance hole 15 is arranged on outer layer 11, hole is to reaching internal layer 13.From this point of view, (EVOH's is molten Point)-the difference of (fusing point of random copolymer) is the bigger the better, and preferably 15 DEG C or more, particularly preferred 30 DEG C or more.This fusing point difference can To be such as 5~50 DEG C, it specifically can be such as 5,10,15,20,25,30,35,40,45,50 DEG C, be also possible at this In numerical value between any two number that shows.

Interior surface layers 13b is the contact layer that 1 content of peel container is laminated, low close by such as low density polyethylene (LDPE), straight chain The polyolefin for spending polyethylene, high density polyethylene (HDPE), polypropylene, ethylene-propylene copolymer and its mixture etc. is constituted, preferably by low Density polyethylene or straight-chain low density polyethylene are constituted.The tensile modulus of elasticity preferably 50 of the resin of composition interior surface layers 13b~ 300MPa, preferably 70~200MPa.Because tensile modulus of elasticity is in this range, interior surface layers 13b particularly soft.Stretch bullet Property modulus specifically can be such as 50,100,150,200,250,300Mpa, be also possible to shown here any two Numerical value between number.

Adhesive layer 13c can be added to the acid modified polyolefin that carboxyl is imported with into said polyolefins (such as: Malaysia Anhydride modified lldpe) obtained from or ethylene vinyl acetate copolymers (EVA), have bonding evoh layer 13a and Nei Biao The function of surface layer 13b.An example of adhesive layer 13c is that low density polyethylene (LDPE) or straight-chain low density polyethylene and acid are modified poly- The mixture of ethylene.

Shown in Fig. 7 (b), internal layer 13 is constituting the inside evoh layer 13d that can have as innermost layer, as outermost The outside evoh layer 13e's and adhesive layer 13c being arranged between.

Inside evoh layer 13d is made of ethylene-vinyl alcohol copolymer (EVOH) resin.The experiment of people is (real according to the present invention Test example 4), it was found that using the innermost layer of internal layer 13 as inside evoh layer 13d when, inhibit container in face of limonene absorption or It absorbs, the reduction of the fragrance for the citrus system for as a result issuing citrus system seasoning is suppressed.

But because the rigidity of EVOH resin is relatively high, when EVOH resin is as 13 materials'use of internal layer, usually to EVOH Softening agent is added in resin to be allowed to improve flexibility.However, to the EVOH tree for the inside evoh layer 13d for constituting 13 innermost layer of internal layer If adding softening agent in rouge, softening agent may dissolve out in content, so here as constituting inside evoh layer 13d's EVOH resin is had to using the material for not including softening agent.Because the EVOH resin rigidity for not including softening agent is big, inside If evoh layer 13d is too thick, it is possible to create inner bag 14 is difficult to the problem of swimmingly shrinking when content is discharged.And it is interior If side evoh layer 13d is too thin, inside evoh layer 13d forms uneven adhesive layer 13c and exposes from inner surface of container, in inside Evoh layer 13d pin hole easy to form.Preferably 10~20 μm of thickness of inside evoh layer 13d from such a viewpoint.

The ethylene contents for constituting the EVOH resin of inside evoh layer 13d are such as 25~50mol%, because ethylene contents are got over The flexibility of high inside evoh layer 13d is the better, and ethylene contents are preferably higher than constituting the EVOH resin of outside evoh layer 13e, excellent Select 35mol% or more.Also, it is described in a different manner, the ethylene contents for constituting the EVOH resin of inside evoh layer 13d preferably make The tensile modulus of elasticity of EVOH resin is in 2000MPa or less.

Outside evoh layer 13e is made of as the evoh layer 13d of inside ethylene-vinyl alcohol copolymer (EVOH) resin.But It is that, because of outside evoh layer 13e discord content contact, addition softening agent can improve flexibility, for this purpose, outside evoh layer 13e Thickness can be thick bigger than inside evoh layer.The thickness of outside evoh layer 13e is not particularly limited, such as can be 20~ 30μm.If outside evoh layer 13e is excessively thin, the barrier properties for gases of la m 13 becomes insufficient, and outside evoh layer 13e is too thick Words, the flexibility that can generate internal layer 13 become inadequate, and inner bag 14 is difficult to the problem of swimmingly shrinking when content is discharged. There is no particular limitation for the thickness rate of evoh layer 13d on the inside of the evoh layer 13e/ of outside, preferably for example, 1.1~4,1.2~2.0.This Than, it specifically can be for example, 1.1,1.2,1.3,1.4,1.5,1.6,1.7,1.8,1.9,2,2.1,2.2,2.3,2.4, 2.5,3,4, the numerical value being also possible between any 2 numerical value shown here.Also, as the outermost of internal layer 13 Layer is arranged to outside evoh layer 13e, can improve the fissility from the internal layer 13 of outer layer 11.

The ethylene contents for constituting the EVOH resin of outside evoh layer 13e are such as 25~50mol%, from oxygen-barrier property Viewpoint considers preferred 32mol% or less.The lower limit of ethylene contents does not have special provision, the fewer outside evoh layer 13e of ethylene contents The easier decline of flexibility, it is advantageous to 25mol% or more.

The ethylene contents of the additive amount of softening agent and this EVOH resin in the EVOH resin of outside evoh layer 13e are constituted, It is preferably set to make the tensile modulus of elasticity of this EVOH resin in 2000MPa or less.Due to inside evoh layer 13d and outside Both evoh layer 13e are that 2000MPa EVOH resin below is constituted by tensile modulus of elasticity, and inner bag 14 can be made swimmingly to shrink. Also, outside evoh layer 13e preferably comprises deoxidier.Since outside evoh layer 13e contains deoxidier, outside evoh layer can be improved The oxygen-barrier property of 13e.

The fusing point for constituting the EVOH resin of outside evoh layer 13e is preferably higher than constituting the fusing point of the resin of outer layer 11.Outside Extraneous gas entrance hole 15 preferably is processed with heated type punching machine on layer 11, because the fusing point of EVOH resin is than constituting outer layer 11 Resin fusing point it is high, when processing extraneous gas entrance hole 15 on outer layer 11, can prevent hole from reaching internal layer 13.From this viewpoint From the point of view of, the difference of (fusing point of EVOH)-(fusing point for constituting the resin of outer layer 11) is the bigger the better, and preferably 15 DEG C or more, particularly preferably 30 DEG C or more.This fusing point difference can be such as 5~50 DEG C, specifically can be such as 5,10,15,20,25,30,35, 40,45,50 DEG C, the numerical value being also possible between any two number shown here.

Adhesive layer 13c is the layer being arranged on the outside of inside evoh layer and 13d between evoh layer 13e, be can be to above-mentioned poly- The acid modified polyolefin (such as: maleic anhydride modified polyethylene) that alkene addition imports carboxyl obtains or ethylene vinyl acetate second Alkenyl copolymers (EVA) have the function of bonding evoh layer 13a and interior surface layers 13b.An example of adhesive layer 13c, is low The mixture of density polyethylene or straight-chain low density polyethylene and sour modified poly ethylene.Adhesive layer 13c can directly bond inside Evoh layer 13d and outside evoh layer 13e can also pass through adhesive layer 13c and inside evoh layer 13d or adhesive layer 13c and outside The other interlayer ground connection bonding being arranged between evoh layer 13e.

The thick rigidity of the unit of adhesive layer 13c is all smaller than any one of inside evoh layer 13d and outside evoh layer 13e, That is, flexibility is good.For this purpose, thickening the ratio that adhesive layer 13 makes the thickness of adhesive layer 13c account for 13 integral thickness of internal layer Increase, therefore flexibility is enhanced, inner bag 14 is easy swimmingly to shrink when content is discharged.Specifically, adhesive layer 13c Thickness and outside evoh layer 13e of the thickness preferably than inside evoh layer 13d it is thick and big.Adhesive layer 13c/ (inside EVOH Evoh layer 13e outside layer 13d+) thickness ratio be for example, 1.1~8, specifically for example, 1.1,1.5,2,2.5,3,3.5,4, 4.5,5,5.5,6,7,8, the numerical value being also possible between any two number shown here.

Secondly, illustrating an example of the manufacturing method of the stacking peel container 1 of present embodiment.

Firstly, as shown in Fig. 9 (a), squeezing out has stepped construction corresponding to container body 3 to be produced (example is It is in order the stacking knot of PE layers/adhesive layer/evoh layer/PP layers/regeneration zone/PP layers from container inner face side as shown in Fig. 9 (a) Structure) molten state be laminated parison, the stacking parison of this molten state is placed on blow molding segmented mold, close Segmented mold.Then, as shown in Fig. 9 (b), it is inserted into blow nozzle in the opening portion of 9 side of oral area of container body 3, is being closed It blows in the state of mold into the die cavity of segmented mold.

Then, as shown in Fig. 9 (c), segmented mold is opened, takes out blow molding product.Segmented mold, which has, pacifies valve member Recess portion 7a, air flow channel 7b are filled, bottom seals the mold cavity shapes of the 3 various shape blow moldings of container bodies such as protruding portion 27.And And in segmented mold, it is equipped with pinch-off portion below bottom sealing protruding portion 27, is formed on the downside of bottom sealing protruding portion 27 to remove Flash.

Secondly, making the blow molding product taken out form a line as shown in Fig. 9 (d).

Secondly, as shown in Fig. 9 (e), only in 11 aperture of outer layer at the top cylindrical portion 31 for being set to 9 upside of oral area, It is blown between outer layer 11 and internal layer 13 with air blower 33, the position (valve member mounting recess 7a) of valve member 5 is installed in receiving portion 7 From 11 prestripping internal layer 13 of outer layer.Prestripping can make the process for processing extraneous gas entrance hole 15, and install valve member 5 Process is easier to carry out.In addition, cover can be used in order to avoid the air blown into is leaked out from the tip side of top cylindrical portion 31 Cover 31 tip side of top cylindrical portion.Also, because only squeezing top cylindrical portion 31 before 11 aperture of outer layer, aperture can make Internal layer 13 is removed at top cylindrical portion 31 from outer layer 11.Also, prestripping can carry out entire receiving portion 7, can also be to receipts The a part in appearance portion 7 carries out.

Secondly, processing extraneous gas entrance hole 15 in shell 12 with boring device as shown in Fig. 9 (f).Extraneous gas imports The preferred circular hole in hole 15, other shape can also be with.

Internal layer prestripping and extraneous gas entrance hole aperture process, can also carry out in accordance with the following methods.Firstly, as schemed Shown in 10 (a), the air of 14 the inside of inner bag, 14 the inside air pressure of inner bag decline are sucked out from oral area 9.Under this state, with heat pipe or The punching machine of pipe cutter form pressurizes at leisure to outer layer 11.This punching machine has tubular knife, and the sky inside cylinder is sucked out Gas.When not having aperture on outer layer 11, air is not entered between outer layer 11 and internal layer 13, internal layer 13 is not removed from outer layer 11.

When tubular knife gets through outer layer 11, as shown in Figure 11 (b), the excision piece being cut off is removed out of tubular knife, is formed outer Portion's gas introducing port 15.This moment, air enter between outer layer 11 and internal layer 13, and internal layer 13 is removed from outer layer 11.

Secondly, as shown in Figure 10 (c)~(d), it is expanding to external gas introducing port 15 with boring device.In addition, if If having formd the sufficiently large extraneous gas entrance hole 15 being inserted into for valve member 5 in Figure 10 (a)~(b) process, just The expanding process of Figure 10 (c)~(d) is not carried out again.

The aperture process of internal layer prestripping and outer gas entrance hole can be carried out according to the following method.Here, with Figure 11 (a) ~(f), with the punching machine 2 of heated type, the gas entrance hole 15 over the shell 12 of stacking peel container 1, the pre- stripping of explanation later From method.

Firstly, stacking peel container 1 is disposed proximate to the position of punching machine 2 as shown in Figure 11 (a).Punching machine 2 Have, tubular blade 2a, the motor 2c of driving blade 2a rotation, the heating device of heated blade 2a are rotated by conveyer belt 2b 2d.Punching machine 2 can move on the direction arrow X1 of Figure 11 (c) and the direction arrow X2 of Figure 11 (e), by by servo motor Rotation (not shown) support of servo cylinder that keeps punching machine 2 uniaxial mobile.By such composition, make the blade being heated While 2a rotates, front end can be pressed on the shell 12 of stacking peel container 1.Moreover, being worn by servomotor control The position and movement speed of aperture apparatus 2, can shorten productive temp.

The snorkel 2e in the cavity in connection blade 2a, the suction that snorkel 2e connection is not shown are connected on blade 2a Exhaust apparatus.Accordingly, air can be sucked out inside blade 2a and to being blown into air inside blade 2a.Heating device 2d, which has, to be led The coil 2e that line is formed, coil 2e are passed through alternating current according to electromagnetic induction principle heated blade 2a.Heating device 2d is close to be blown Mould molded product 1a setting and it is not androgynous with blade 2a.Due to such composition, the wiring of heating device 2d becomes simply, and The front end of blade 2a can effectively heat.

Secondly, punching machine 2 makes in blade 2a intrusion coil 2f close to stacking peel container 1 as shown in Figure 11 (b).This By being passed through alternating current in coil 2f come heated blade 2a under a state.

Secondly, making punching machine 2 in arrow X1 direction high-speed mobile until the front end of blade 2a is arrived as shown in Figure 11 (c) Reach the position being closely laminated before peel container 1.

Secondly, the same of the front end that the air inside blade 2a makes attraction act on blade 2a is sucked out as shown in Figure 11 (d) When, 2 dead slow speed of punching machine is close to stacking peel container 1, and the front end of blade 2a is allowed to invade the shell 12 of stacking peel container 1. In this way, productive temp can be shortened by the mobile combination of high-speed mobile and dead slow speed.In addition, making punching machine 2 in this real mode It moves integrally, in other embodiments, blade 2a is individually moved in cylinder mechanism etc., and high-speed mobile is until the front end of blade 2a To the position reached before peel container 1 is closely laminated, blade 2a makes the movement of blade 2a dead slow speed can also when invading shell 12 With.

If the front end of blade 2a reaches the boundary of shell 12 and inner bag 14, shell 12 is got through into the shape of the front end blade 2a Shape forms outer gas entrance hole 15.Piece 15a is cut off when shell 12 is got through to be inhaled into the cavity of blade 2a.The front end blade 2a It can stop moving when reaching shell 12 and 14 boundary of inner bag, in order to which outer gas entrance hole 15 is formed more reliably, blade can be made The front end of 2a is mobile until being more than that shell 12 and the interface of inner bag 14 are squeezed by inner bag 14.At this moment, in order to inhibit blade 2a to interior The damage of bag 14, the front end geometry of blade 2a is compared to shape sharp as shown in Figure 12 (a) the preferably circle as shown in Figure 12 (b) Shape.The front end of blade 2a is to be difficult to outer gas entrance hole 15 in shell 12 if round shape, in present embodiment, according to making to be added The blade 2a rotation of heat, is easily worked outer gas entrance hole 15 in shell 12.And in order not to make the thermal conductivity of blade 2a cause inner bag 14 dissolve, and the fusing point for constituting the outermost resin of inner bag 14 is preferably higher than constituting the fusing point of the resin of 12 innermost layer of shell.

Secondly, retreating punching machine 2 along the direction arrow X2 as shown in Figure 11 (e), being blown into sky into the cavity of blade 2a Gas, excision piece 15a are released from the front end of blade 2a.

Above process completes the molding of outer gas entrance hole 15 on shell 12.

Secondly, with air blower 33, being led to by outer gas entrance hole 15 between shell 12 and inner bag 14 as shown in Figure 11 (f) Entering air makes shell 12 from 14 prestripping of inner bag.And keep outer gas entrance hole 15 air tight while being blown into the air of specified amount, it is interior The control of the prestripping of bag 14 becomes easy.Prestripping can carry out entire receiving portion 7, can also be to a part of receiving portion 7 It carries out, because the position of prestripping cannot not check whether inner bag 14 has pin hole, preferably in the substantially whole of receiving portion 7 On, make inner bag 14 from 12 prestripping of shell.

Secondly, softening thinner wall section 27a bottom sealing 27 blowing hot-air of protruding portion, the sealing of bending bottom is prominent as shown in Figure 13 (a) Portion 27 out.

Secondly, carrying out the pin hole inspection of inner bag 14 as shown in Figure 13 (b).It is engaged specifically, being installed first in oral area 9 Device 35 injects the inspection gas comprising particular types gas to inner bag 14 is inner by oral area 9.Inner bag 14 is inner there are if pin hole, Particular types gas is leaked out by pin hole from intermediate space 21, passes through the discharge discharge container of outer gas entrance hole 15 from intermediate space 21 Outside.The outer sense part (detector) 37 that specific gas is equipped with close to the position of outer gas entrance hole 15 of container, can perceive particular types The leakage of gas.It is judged as in inner bag 14 when the concentration of the particular types gas perceived by sense part 37 is below threshold value and does not deposit In pin hole, it is qualified product that peel container 1, which is laminated,.On the other hand, the concentration for the particular types gas that sense part 37 perceives is more than It is judged as in inner bag 14 that, there are pin hole, it is rejected product that peel container 1, which is laminated, when threshold value.The stacking for being judged as rejected product Peel container 1 is removed from production line.

It is suitable for the gas (preferably 1% gas below) for selecting the amount in air few as particular types gas kind, Such as hydrogen, carbon dioxide, helium, argon, neon etc..The concentration for checking the particular types gas in gas, is not particularly limited, and checks Gas can only have particular types gas composition, be also possible to the mixed gas of air and specific gas.

Check that the injection pressure of gas is not particularly limited, e.g. 1.5~4.0kPa.It is special if injection pressure is too low The amount of leakage for determining species becomes very few, may be in spite of there are pin holes all to perceive less than specific gas, injection pressure mistake If height, check that and then for 14 turgor pressure of inner bag on shell 12, being related to reduces pin hole inspection in inner bag 14 after gas injection The precision looked into.

In present embodiment, the setting of sense part 37 is outer close to outer gas entrance hole 15 in stacking peel container 1, as deformation Example is inserted into intermediate space 21 sense part 37 by outer gas entrance hole 15, can be allowed to detect in intermediate space 21 Specific gas.At this moment, it through the specific gas of 14 pin hole of inner bag before diffusion, can be perceived, thus, it is possible to improve specific gas Perceived accuracy.As other variations, the inspection gas containing specific gas is injected intermediate sky from outer gas entrance hole 15 Between 21, the specific gas to inside inner bag 14 is leaked in perception by the pin hole of inner bag 14.

At this moment, sense part 37 can be set close to the position of the oral area 9 outside container, it can be in from oral area 9 to inner bag 14 It is inserted into sense part 37.

Stacking peel container 1 after pin hole inspection can be sent directly into lower process, as variation, can also carry out inwardly 14 the inside of bag is blown into the process for being sent to next portion after the process that air expands inner bag 14.In the latter, it is convenient to omit Figure 13 (e) process of air is blown into.

Secondly, valve member 5 is inserted into extraneous gas entrance hole 15 as shown in Figure 13 (c).

Secondly, cutting away top cylindrical portion 31 as shown in Figure 13 (d).

Secondly, 14 blowing to internal bag as shown in Figure 13 (e), heaving inner bag 14.

Secondly, filling content inside inner bag 14 as shown in Figure 13 (f).

Secondly, installing nut cap 23 in oral area 9 as shown in Figure 13 (g).

Secondly, packing receiving portion 7 as shown in Figure 13 (h) with shrink film, completing product.

The sequence of various processes shown here, can suitably exchange.For example, hot wind bending operation can be over It, can also be before internal layer prestripping process before gas introducing port process.And the process for cutting off top cylindrical portion 31, can be with It is carried out before valve member 5 is inserted into extraneous gas entrance hole 15.

Working principle when product uses will be illustrated next.

As shown in Figure 14 (a)~(c), inclination is equipped in the state of the product of content, holds and squeeze shell 12 Content is discharged in side.When beginning to use, substantially without gap between inner bag 14 and shell 12, apply pressure on shell 12 Power, is directly translated into the pressure of inner bag 14, and content is discharged in compression inner bag 14.

Nut cap 23 is provided with check-valves (not shown), and the content in inner bag 14 can be made to be discharged, and outside air does not enter interior 14 the inside of bag.For this purpose, if removing the pressure being applied on shell 12 after content discharge, restoring force of the shell 12 because of itself Be restored to original shape, make inner bag 14 maintain atrophy state and only shell 12 expand.Also, it is interior as shown in Figure 14 (d) It is decompression state inside intermediate space 21 between bag 14 and shell 12, the air of outside is led by the extraneous gas on shell 12 Enter hole 15 and enters 21 the inside of intermediate space.When intermediate space 21 is decompression state, cover 5c does not block extraneous gas entrance hole 15, do not hinder extraneous gas to import.Also, it is not interfered holding section 5b in the state that holding section 5b is contacted with shell 12 Extraneous gas imports, and in holding section, 5b, which is equipped with protrusion 5d or groove etc., ensures the means of airway patency.

Secondly, the side of simultaneously compression shell 12 is held again, because of cover 5c block outside gas as shown in Figure 14 (e) Entrance hole 15, the pressure rise of 21 the inside of intermediate space, the pressure being applied on shell 12 pass to inner bag by intermediate space 21 14, forcing contracting inner bag 14 by this is discharged content.

Secondly, as shown in Figure 14 (f), if removing the pressure being applied on shell 12 after content discharge, shell 12 1 Enter intermediate space 21 from extraneous gas entrance hole 15 while being extraneous gas, on one side due to the restoring force of itself be restored to it is original Shape.

2. the 2nd embodiment

Hereinafter, being illustrated with stacking peel container of the Figure 15 to the 2nd embodiment of the invention.In present embodiment Stacking peel container 1 and the 1st embodiment have same layer composition and function, and only specific shape is different.Present embodiment Composition of the stacking peel container 1 near valve member mounting recess be different from the first embodiment.Hereinafter, centered on this point It is illustrated.

As shown in Figure 15 (a), in the stacking peel container 1 of present embodiment, oral area 9 and trunk 19 connect shoulder 17. In 1st embodiment, it is equipped with bending part 22 in shoulder 17, in present embodiment, is not provided with bending part 22, shoulder in shoulder 17 17 and the boundary 20 of trunk 19 have a function same as bending part 22, inhibit the removing of inner bag 14 to arrive oral area 9.

The trunk 19 that substantially vertical wall is constituted is arranged in valve member mounting recess 7a, is equipped in valve member mounting recess 7a The inclined-plane that flat site FR, flat site FR are 70 degree or so.Outer gas entrance hole 15, outer gas entrance hole are equipped in flat site FR The width W of flat site FR around 15, in a same manner as in the first embodiment in 3mm or more.The side wall 7c of valve member mounting recess 7a Towards the tapered face of outer expandable, the mold to form valve member mounting recess 7a is made to become easy abjection.Also, inner bag 14 is as schemed Shown in 15 (c), removing is become easy as starting point using the upper limb 7d of flat site FR.

3. the 3rd embodiment

Secondly, being illustrated with Figure 21 to the stacking peel container 1 in the 3rd embodiment of the invention.Present embodiment In stacking peel container 1 and the 1st~with the 2nd embodiment have the function of same layer composition and, but the composition of valve member 5 is not Together.

Specifically, the holding section 5b of valve member 5 has a pair of of base portion 5b1 in present embodiment, setting base portion 5b1 it Between bridge portion 5b2.Axle portion 5a is arranged in bridge portion 5b2.

The structure of cover 5c is when shell 12 compresses to block substantially extraneous gas entrance hole 15, is had with close The tapered surface 5d that the cross section axle portion 5a becomes smaller.Extension side of the inclination angle beta of tapered surface 5d shown in Figure 21 (c) preferably with axle portion 5a It is in 15~45 degree, more preferable 20~35 degree to D.If inclination angle beta is excessive be easy gas leakage, it is too small if valve member 5 become long.

Also, it shown in holding section 5b such as Figure 21 (d), is mounted in the state of outer gas entrance hole 15, base portion 5b1 is through bearing surface 5e is connected to shell 12 and 5b2 bending in bridge portion is constituted.According to such composition, the direction shown in bridge portion 5b2 arrow FO generate from Container leaves the recuperability on direction, applies the power of the same direction to cover 5c accordingly, and cover 5c is crushed on shell 12.

In this condition, cover 5c is only gently pressed on shell 12, if compression shell 12, in intermediate space 21 Pressure ratio external pressure it is high, according to this pressure difference cover 5c by the bigger gas entrance hole 15 outside that forces, cover 5c blocks outer gas Entrance hole 15.Because being equipped with tapered surface 5d in cover 5c, cover 5c is easy insertion extraneous gas entrance hole 15 to block outside Gas introducing port 15.

In this condition if further compression shell 12, as a result the pressure rise of 21 the inside of intermediate space makes inner bag 14 compressions, the content of 14 the inside of discharge inner bag.Also, if releasing pressure suffered by shell 12, elastic housing 12 is due to certainly Body has the tendency that restoring.It is right thus as shown in Figure 21 (e) as shell 12 restores air pressure decline in intermediate space 21 Cover 5c container inside direction applied force FI.As a result, bridge portion 5b2 bending increase while between cover 5c and shell 12 shape At gap Z, by being imported in access 5f between bridge portion 5b2 and shell 12, outer gas entrance hole 15, gap Z-direction intermediate space 21 Outer gas.

In present embodiment, valve member 5 utilizes the composition letter along parting line L shown in Figure 21 (a), divided to X-direction Easy segmented mold can keep productivity good by ejection formation etc..

[embodiment]

1. experimental example 1

In experimental example below, blow molding has the stacking peel container of outer layer 11 and internal layer 13, is perforated with heated type Device only forms the outer gas entrance hole 15 of φ 4mm on the outer layer 11 with a thickness of 0.7mm.And such as 1 institute of Figure 16~Figure 20 and table The valve member 5 for the configuration example 1~5 shown is ejection formation, by outer gas entrance hole 15 that the cover 5c indentation of valve member 5 is intermediate 21 the inside of space.

To the workability of the valve member 5 in configuration example 1~5, mouldability, resistance to obliquity, conveying property evaluated.As a result such as Shown in table 1 below.In each assessment item in table 1 ×, △, zero be opposite evaluation result, △ indicates ratio × evaluation As a result more preferable, zero indicates not worse than △ evaluation result.

[table 1]

Workability is the evaluation that outer gas entrance hole 15 whether can be swimmingly opened and closed for valve member 5.In the length of axle portion 5a In the configuration example 1 also shorter than 11 thickness of outer layer, sliding possible length is 0, and outer gas entrance hole 15 is closed state.In configuration example 2, Valve member 5 can be opened and closed outer gas entrance hole 15, but movement has some setbacks sometimes.And configuration example 3~5, valve member 5 can swimmingly be opened and closed outer Gas entrance hole 15.Such as in configuration example 2 valve member 5 act the reason of having some setbacks be slide may length (length-of axle portion 5a is outer Layer 11 is thick) it is 0.7mm, curtailment and the corresponding gap of the outer gas entrance hole 15 (diameter of outer gas entrance hole 15-axle portion 5a Diameter) it is 0.2mm, not enough greatly.And in configuration example 3~5, sliding possible length is 1mm or more, and length is enough, outer gas entrance hole 15 corresponding gaps are 0.3mm or more, because sufficiently large, valve member 5 swimmingly works.In addition, sliding possible length is more than 2mm If, valve member 5 is easy to interfere shrink film and internal layer 13, and the sliding of valve member 5 may length preferably 1~2mm thus.

Mouldability is the evaluation for the easness of ejection formation valve member 5.The surface of the side axle portion 5a of holding section 5b, Protrusion 5d is equipped with as configuration example 1, when being equipped with groove 5e at circumferential equally spaced 4 as configuration example 2, valve portion after molding Part 5 is because from the unreasonable extraction of segmented mold, or needs to prepare the mold of special construction, insufficient formability.And as configuration example 3~ As 5, at equally circumferentially spaced 2 when groove 5e, valve member 5 is easy to take out from segmented mold, good forming ability.

Resistance to obliquity is that cover 5c is pressed in the state of outer gas entrance hole 15, in air introduction hole 15 when tilting valve member 5 Whether place is easy to produce the evaluation in gap.The shape of boundary 5f as cover 5c and axle portion 5a, as configuration example 1~2 to When inside is recessed into R shape, when valve member 5 tilts, in the gap easy to form of air introduction hole 15.And as cover 5c's and axle portion 5a The shape of boundary 5f is when being expanded into R shape outward as configuration example 3~5, when valve member 5 tilts, it is difficult to enter in outer conductance Hole 15 forms gap.Also, the corresponding gap of 3 China and foreign countries' gas entrance hole of configuration example 15 is 0.7mm, because too big, valve member 5 is very big When ground tilts, it is easier to form gap.And in configuration example 4~5, the corresponding gap of outer gas entrance hole 15 be 0.6mm hereinafter, Because size is appropriate, the excessive inclination of valve member 5 is inhibited by.If workability and resistance to obliquity, outer gas entrance hole 15 corresponding gap preferably 0.2~0.7mm, more preferable 0.3~0.6mm.

Conveying property is on being spaced 2 parallel orbits more slightly larger than the diameter of cover 5c, with the part confession for keeping valve member 5 Whether readily evaluated to device conveying.Valve member 5, cover 5c are passed down through between 2 tracks, and holding section 5b is stuck in parallel orbit On be kept.Further conveying property can be classified as, resistance to plyability and resistance to deciduous.

Evaluation of the resistance to plyability about the difficulty to overlap between the holding section 5b of valve member 5.In configuration example 1~4, The thickness of holding section 5b is 1mm, is not enough thickness, overlapping is easy to happen between the 5b of holding section.And in configuration example 5, engaging The thickness of portion 5b is 1.2mm or more, and thickness is enough, and overlapping is difficult to happen between the 5b of holding section.

The evaluation that can the valve member of resistance to deciduous 5 be properly maintained from parallel orbit disengaging by parallel orbit.In structure At in example 1~4, the overhang (diameter of holding section 5b-cover 5c diameter) of holding section 5b is 1.5mm hereinafter, because too small, Valve member 5 is easy to be detached from from parallel orbit.And in configuration example 5, the overhang of holding section 5b is 2mm or more, valve member 5 not from Parallel orbit is detached from, and is easy conveying using parallel orbit.

In the valve member 5 of configuration example 5, as shown in Figure 20 (c), the holding section outer surface 5b is equipped with recess portion 5g.Ejection formation valve When component 5, the position for projecting cast gate generates flash, and the position due to projecting cast gate is avoided that flash interference is received in recess portion 5g Contracting film (Shrink film).

2. experimental example 2

In experimental example below, blow molding has the stacking peel container of outer layer 11 and internal layer 13, is worn with heated type Aperture apparatus only processes the outer gas entrance hole 15 of φ 4mm on the outer layer 11 with a thickness of 0.7mm.To the content of stacking peel container Flat site FR in amount, the size of outer gas entrance hole 15 and valve member mounting recess 7a is outside around gas entrance hole 15 Width W has made various changes, has manufactured 1~No. 5 stacking peel container sample.Also, ejection formation, which manufactures, shows shape in Figure 20 The cover 5c of valve member 5 is pressed into intermediate space 21 by outer gas entrance hole 15 by the valve member 5 of shape.Obtained stacking removing is held After filling content (water) in device, squeezing stacking peel container side makes content from stacking peel container discharge.Evaluation row The discharging performance when content of inner capacities 80% (discharging performance when content is a small amount of) out.Content is smoothly discharged out to comment Valence is "○", and content is difficult to be discharged as "×".Its result is shown in table 2.

[table 2]

Sample No.	1	2	3	4	5
						Inner capacities (ml)	200	200	200	200	500
The diameter of outer gas entrance hole	4.0	3.8	3.7	3.7	4.0
						The width W of flat site FR	2.0	2.1	2.2	4.2	4.0
Discharging performance when content is a small amount of	×	×	×	○	○
						The radius of curvature (mm) of inner surface of outer cover	30	30	30	300	750

As shown in table 2,1~No. 3 sample discharging performance when content is a small amount of is low, and 1~No. 5 sample is when content is a small amount of Discharging performance is high.In order to verify the reason of obtaining such result, about each sample, the range of 15 surrounding 2mm of gas entrance hole outside The radius of curvature of interior measurement 12 inner surface of shell, obtains result shown in table 2.It was found that as shown in table 2,12 outer surface of shell is put down If 3mm or more, the radius of curvature of the inner surface of shell 12 becomes larger the inner surface of shell 12 the amplitude W of smooth region FR significantly Generally become flat.On the other hand if the amplitude W of the flat site FR of the outer surface of discovery shell 12 is discontented with 3mm, shell 12 inner surfaces are uneven but curved.Then find that this flexure plane cannot properly cooperate with valve member 5, because from outer gas 15 air of entrance hole leaks into air, it was found that discharging performance when content is few is lower.

3. experimental example 3

In experimental example below, blow molding produces the different stacking peel container of various layer structures, to restoration, just Property, impact resistance, heat resistance is transparent, barrier properties for gases, mouldability, and outer layer processability etc. is evaluated.In addition, outer layer adds Work expression only forms the easness of processing air introduction hole with heated type punching machine in outer layer.

In configuration example 1, layer composition is random copolymerization nitride layer/evoh layer/adhesive layer/LLDPE layers from container exterior in order. Random copolymer (pattern: novaTecEG7FTB, Japanese polypuro plants of formula as random copolymerization nitride layer propylene and ethylene Commercial firm's system, 150 DEG C of fusing point).As evoh layer, with dystectic EVOH (pattern: soanoruSF7503B, Japan's synthesis chemistry Co., Ltd.'s manufacture, 188 DEG C of fusing point, bending elastic modulus 2190MPa).After carrying out above-mentioned various evaluations, in whole evaluations Outstanding result is obtained in project.

In configuration example 2, layer composition be in order from container exterior random copolymerization nitride layer/regeneration zone/random copolymerization nitride layer/ Evoh layer/adhesive layer/LLDPE layers.The flash that generates in the formation of container is reused forming material by regeneration zone, on composition It is very close with random copolymerization nitride layer.Random copolymerization nitride layer and evoh layer are formed as configuration example 1 by same material.It carries out above-mentioned Various evaluations after, obtain outstanding result on whole assessment items.

In configuration example 3, layer constitute as configuration example 1, but the EVOH of evoh layer low melting point (pattern: Soanoru A4412, Japan's synthesis chemistry manufacture, 164 DEG C of fusing point).After carrying out above-mentioned various evaluations, in whole scoring items Obtained on mesh it is outstanding as a result, whole assessment items other than outer layer processability it is outstanding as a result, but, being processed about outer layer Property is slightly worse than configuration example 1.This as a result, (fusing point of EVOH)-(fusing point of random copolymerization nitride layer) difference, it was confirmed that preferably 15 DEG C or more.

< compares 1 > of configuration example

In relatively configuration example 1, layer composition be followed successively by order from outside of containers LDPE layer/evoh layer/adhesive layer/ LLDPE layers.Above-mentioned various evaluations are carried out, result is that at least rigidity is low with heat resistance.

< compares 2 > of configuration example

Compare in configuration example 2, layer composition is followed successively by HDPE layer/evoh layer/adhesive layer/LLDPE from container exterior in order Layer.Above-mentioned various evaluations are carried out, result is that at least restoration and the transparency is low.

< compares 3 > of configuration example

Compare in configuration example 3, layer composition be followed successively by order from container exterior polypropylene layer/evoh layer/adhesive layer/ LLDPE layers.In the material of polypropylene layer, having used fusing point is the homogeneous polymers of 160 DEG C of propylene.In evoh layer, use and structure At the material as example 1.Above-mentioned various evaluations are carried out, result is that at least impact resistance is low.Also, outer layer processability compares configuration example 1 is poor.

< compares 4 > of configuration example

Compare in configuration example 4, layer composition be followed successively by order from container exterior block copolypeptide layer/evoh layer/adhesive layer/ LLDPE layers.Above-mentioned various evaluations are carried out, result is that at least the transparency and impact resistance are low.

< compares 5 > of configuration example

Compare in configuration example 5, layer composition is followed successively by pet layer/evoh layer/adhesive layer/LLDPE from container exterior in order Layer.Above-mentioned various evaluations are carried out, result is that at least mouldability and heat resistance is low.

< compares 6 > of configuration example

Compare in configuration example 6, layer composition be followed successively by order from container exterior aramid layer/evoh layer/adhesive layer/ LLDPE layers.Above-mentioned various evaluations are carried out, result is that at least mouldability is low.

< compares 7 > of configuration example

Compare in configuration example 6, layer composition be followed successively by order from container exterior polypropylene layer/aramid layer/adhesive layer/ LLDPE layers.Above-mentioned various evaluations are carried out, result is that at least barrier properties for gases and mouldability is low.

< resistance to bend(ing) tests >

As the EVOH resin that evoh layer uses, Apparatus for Bending at low-temp (Brugger system, KFT- based on ASTM F392 are used C-Flex Durability Tester) carry out resistance to bend(ing) test.Experimental enviroment is 23 DEG C, 50%RH.

Firstly, having made the sample formed by the monofilm of 28cm × 19cm × 30 μm.

Secondly, a pair of plug (diameter 90mm) in interval 180mm setting is wrapped with the long side of above-mentioned sample, thus sample Both ends fixed a pair of of plug A, B.

Secondly, plug A is kept to fix, slowly while reverse plug B close, windup-degree moves horizontally for 440 degree Stop torsion when distance is 9.98cm.Hereafter, continue plug B to continue to move horizontally, moving horizontally distance after stopping torsion is Stop moving horizontally when 6.35cm.

Hereafter, plug B is made to be restored to initial state by movement contrary to the above.After such movement carries out 100 times, inspection Whether look into has pin hole.The results are shown in Table 3 for it.

[table 3]

SF7503B in table 3 is the EVOH resin used as 1EVOH layers of configuration example.On the other hand, in table 3 D2908 is general EVOH resin soanoruD2908 (pattern: soanoruSF7503B, Japan's synthesis Chemical Co., Ltd. system It makes).2 tests have been carried out about each EVOH resin.

As shown in table 3, it is found by above-mentioned test, opposite D2908 forms most pin holes, SF7503B absolutely not shape It is outstanding compared to general EVOH resin resistance to bend(ing) at pin hole.

4. experimental example 4

In experimental example below, blow molding produces the different stacking peel container of various layer structures, in obtained container After interior filling orange vinegar, after standing 1 week, the orange vinegar in container is discharged all, it is fragrant to the citrus system of discharged orange vinegar Taste has carried out sensory evaluation.Also, when orange vinegar is discharged, visual assessment is carried out to the shape of the inner bag of container.

The layer composition of configuration example 1 be followed successively by order from container exterior random copolymerization nitride layer/outside evoh layer (thick 25 μm)/ Adhesive layer (150 μm thick)/inside evoh layer (15 μm thick).Outside evoh layer is formed by the EVOH resin of addition softening agent, inside Evoh layer is formed by the EVOH resin for not adding softening agent.Adhesive layer due to straight-chain low density polyethylene and sour modified poly ethylene with Mass ratio 50:50 is mixed to form.Above-mentioned evaluation is carried out, result is the intensity of the fragrance for the citrus system that discharged orange vinegar issues With filling when almost without difference.And as orange vinegar is discharged, inner bag does not bend and swimmingly shrinks when shrinking.

In the layer of configuration example 2 is constituted, other than side evoh layer is with a thickness of 5 μm, as configuration example 1.It carries out Above-mentioned evaluation, result be the citrus system fragrance that discharged orange vinegar issues intensity than configuration example 1 compared to slightly poor.Also, with Orange vinegar discharge, inner bag shrink when do not bend and swimmingly shrink.

In the layer of configuration example 3 is constituted, other than inside evoh layer is with a thickness of 25 μm, as configuration example 1.Into The above-mentioned evaluation of row, result is the intensity for the citrus system fragrance that discharged orange vinegar issues and configuration example 1 is equal extent.And As orange vinegar is discharged, when inner bag is shunk, bending is easy compared to 1 inner bag of configuration example.

The layer of configuration example 4 is constituted in addition to outside evoh layer is with a thickness of 75 μm, adhesive layer with a thickness of other than 80 μm and structure At as example 1.Above-mentioned evaluation is carried out, result is that the intensity for the citrus system fragrance that discharged orange vinegar issues is with configuration example 1 Equal extent.And when shrinking with orange vinegar discharge inner bag, bending is easy compared to 1 inner bag of configuration example.

< compares 1 > of configuration example

Compare configuration example 1 layer constitute in addition to inside evoh layer be replaced as straight-chain low density polyethylene layer (50 μm) with Outside, as configuration example 1.Above-mentioned evaluation is carried out, result is the intensity and structure for the citrus system fragrance that discharged orange vinegar issues At example 1 compared to very poor.Also, as orange vinegar is discharged, inner bag does not bend and swimmingly shrinks when shrinking.

< compares 2 > of configuration example

In the layer of relatively configuration example 2 is constituted, other than inside evoh layer being replaced as aramid layer (50 μm) and structure At as example 1.Above-mentioned evaluation is carried out, result is the intensity and 1 phase of configuration example for the citrus system fragrance that discharged orange vinegar issues Than very poor.Also, as orange vinegar is discharged, inner bag does not bend and swimmingly shrinks when shrinking.

[symbol description]

1: stacking peel container, 3: container body, 5: valve member, 7: receiving portion, 9: oral area, 11: outer layer, 12: shell, 13 : internal layer, 14: inner bag, 15: outer gas entrance hole, 23: nut cap, 27: bottom seals protruding portion.

Claims

1. a kind of stacking peel container, which is characterized in that have container body, the container body have shell and inner bag, and with The reduction of content, the inner bag remove, shrink from the shell,

The container body, which has from the bottom surface bottom outstanding for the receiving portion for accommodating content, seals protruding portion,

The bottom sealing protruding portion is the sealing of the stacking parison in the blow molding for used cylindric stacking parison And be bent, the cylindric stacking parison has the outer layer for constituting shell and constitutes the internal layer of inner bag；

The bottom sealing protruding portion has the thick wall portion of the thickness of thinner wall section described in thinner wall section and wall ratio from the bottom surface side in order；

The bottom sealing protruding portion has the base portion than the thinner wall section closer to bottom surface side；

The base portion is the part thicker than the thinner wall section.

2. stacking peel container as described in claim 1, which is characterized in that the bottom sealing protruding portion is curved in the thinner wall section It is bent.

3. stacking peel container as described in claim 1, which is characterized in that the bottom surface has concave region and is arranged described Neighboring area around concave region,

The bottom sealing protruding portion is arranged in the concave region.

4. stacking peel container as claimed in claim 3, which is characterized in that the bottom sealing protruding portion is configured to curved It is not prominent from the face as defined in the neighboring area under state.

5. stacking peel container as described in claim 3 or 4, which is characterized in that the concave region is set as close at the bottom The longitudinal direction of envelope protruding portion crosses the entire bottom surface.

6. a kind of manufacturing method of stacking peel container according to any one of claims 1 to 5, which is characterized in that

With making the bottom seal protruding portion softening, curved process by the blowing hot air after the blow molding.